TV channels from TVHeadend seen as audio on RPI

Description

When I start playing or switch TV channels from TVHeadend they are first recognised as audio instead of video (with audio). This shows by stuttering and black screen when an audio visualisation is enabled with stock Estaury, and switching to fullscreen audio in a modded skin that has an option to switch to fullscreen playback when audio is starting to play.
See for an example:
​http://forum.kodi.tv/showthread.php?tid=298461&pid=2583433#pid2583433

This only happens on RPI and not on Generic Milhouse builds starting with build 0503. Before that build the problem isn't present.